Mark A. Plummer holds degrees in biology, biochemistry and chemical engineering. He spent 13 years with Sun Oil Company, holding multiple engineering positions in the Arkansas-Louisiana-Texas area and the Gulf of Mexico. In 1994, he founded Chestnut Exploration and Production, an independent oil and natural gas company with operations in the Southwestern United States. Mark is a registered professional engineer with the state of Texas.

Chestnut Exploration is a family-owned, independent, oil and natural gas operator, with specialties in developing new and existing oil fields. Combining proven science and technical knowledge, Chestnut’s engineers and geologists work in areas with proven energy reserves and explore new developments. Chestnut currently operates projects in Texas, Louisiana and New Mexico.